[Phylum] [Arthropoda] Siebold, 1848 - arthropods Chelicerata Heymons, 1901 Euchelicerata Weygoldt & Paulus, 1979 [Order] †Phalangiotarbida Haase, 1890 Family †Architarbidae Karsch, 1882 Genus †Mesotarbus Petrunkevitch, 1949